I noticed that a site participant put a huge (400) bounty recently on an oldish question. I've only touched the surface of that Q&A page, and am planning on spending some time digging into it, but I would have liked to start by reading the Bounty notice (is there some way of retrieving that now, or is gone forever?) and also a comment explaining the choice of answer to award the bounty to.
When I place a bounty, I generally do write a comment like that. (Exception: if I've placed a bounty to draw more attention, but no new answers have been contributed.) I couldn't find such a comment in this case, however.
I invite this bounty placer to write such a comment, since for me it would be a great place to start in reading the whole page; and I'd like to propose that here at Spanish Language Beta SE, at least, we take it as best practice to write an explanatory comment when awarding the bounty.
Es decir, si pones un bounty, por favor, que documentes con comentarios el porqué del bounty y el porqué de tu decisión.